Re: regarding Sculpt on virt_qemu_riscv

Hi Pranab,

These errors indicate that your version of jitterentropy declares jitterentropy_init and jent_entropy_collector_alloc but doesn't implement them. I'd suggest you to lookup the where the other versions (arm, x86) implement the functions and whether the implementations are generic or platform specific. If the latter is the case, you either find an existing riscv implementation in the contrib code (contrib/jitterentropy*) or you have to implement the functions for riscv yourself. If the former is the case, you're probably just missed to add the corresponding compilation unit to your makefile (SRC_C variable).

PS: Please don't re-use the file headers (brief, author, copyright) of Genode Labs.

Cheers, Martin

On 22.02.23 12:27, Pranab Kumar Rout cs21m045 wrote:

Hi Martin, Following your suggestion, I added these 2 files.

*repos/libports/src/lib/jitterentropy/spec/riscv/jitterentropy-base-genode-nstime.h**

Its contents are:

/*
 * \brief  Time backend for jitterentropy library
 * \author Josef Soentgen
 * \date   2014-08-18
 */
/*
 * Copyright (C) 2014-2017 Genode Labs GmbH
 *
 * This file is part of the Genode OS framework, which is distributed
 * under the terms of the GNU Affero General Public License version 3.
 */
#ifndef _JITTERENTROPY_RISCV_BASE_GENODE_NSTIME_H_
#define _JITTERENTROPY_RISCV_BASE_GENODE_NSTIME_H_
static inline void jent_get_nstime(__u64 *out)
{
uint32_t t;
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(t));
*out = t;
}

#endif

2.  *repos/libports/lib/mk/spec/riscv/jitterentropy.mk http://jitterentropy.mk* Its contents:

INC_DIR += $(REP_DIR)/src/lib/jitterentropy/spec/riscv

include $(REP_DIR)/lib/mk/jitterentropy.inc

CC_CXX_WARN_STRICT =

And I updated the jitterentropy jitterentropy import file at *repos/libports/lib/import/import-jitterentropy.mk http://import-jitterentropy.mk

Its contents are:

ifeq ($(filter-out $(SPECS),x86_32),)
TARGET_CPUARCH=x86_32
else ifeq ($(filter-out $(SPECS),x86_64),)
TARGET_CPUARCH=x86_64
else ifeq ($(filter-out $(SPECS),arm_v6),)
TARGET_CPUARCH=arm_v6
else ifeq ($(filter-out $(SPECS),arm_v7),)
TARGET_CPUARCH=arm_v7
else ifeq ($(filter-out $(SPECS),arm_v8),)
TARGET_CPUARCH=arm_v8
else ifeq ($(filter-out $(SPECS),riscv),)
TARGET_CPUARCH=riscv
endif

JITTERENTROPY_DIR := $(call select_from_ports,jitterentropy)

ifeq ($(CONTRIB_DIR),)
REP_INC_DIR += include/jitterentropy
else
INC_DIR += $(JITTERENTROPY_DIR)/include/jitterentropy
endif

INC_DIR += $(call select_from_repositories,src/lib/jitterentropy)these
INC_DIR += $(call
select_from_repositories,src/lib/jitterentropy/spec/$(TARGET_CPUARCH))

CC_OPT += -DJITTERENTROPY_GENODE

After running

...

/make run/sculpt KERNEL=hw BOARD=virt_qemu_riscv/

I am getting such error:

checking library dependencies...
  Library ldso_so_support
    COMPILE  so_support.o
    MERGE    ldso_so_support.lib.a
  Library ld
    CONVERT  ld.symbols.s
    ASSEMBLE ld.symbols.o
    MERGE    ld.abi.so <http://ld.abi.so>
  Library base
    MERGE    base.lib.a
  Library block_session
    MERGE    block_session.lib.a
  Library config
    MERGE    config.lib.a
  Library jitterentropy
    MERGE    jitterentropy.lib.a
  Library os
    MERGE    os.lib.a
  Program app/gpt_write/gpt_write
    COMPILE  main.o
    COMPILE  util.o
    LINK     gpt_write
/usr/local/genode/tool/21.05/bin/../lib/gcc/riscv64-unknown-elf/10.3.0/../../../../riscv64-unknown-elf/bin/ld:
util.o: in function `Util::init_random(Genode::Allocator&)':
/home/pranab/MTP/r5/genode/depot/genodelabs/src/gpt_write/2023-02-22-c/src/app/gpt_write/util.cc:39:
*undefined reference* to `jitterentropy_init(Genode::Allocator&)'
/usr/local/genode/tool/21.05/bin/../lib/gcc/riscv64-unknown-elf/10.3.0/../../../../riscv64-unknown-elf/bin/ld:
/home/pranab/MTP/r5/genode/depot/genodelabs/src/gpt_write/2023-02-22-c/src/app/gpt_write/util.cc:41:
*undefined reference* to `jent_entropy_init'
/usr/local/genode/tool/21.05/bin/../lib/gcc/riscv64-unknown-elf/10.3.0/../../../../riscv64-unknown-elf/bin/ld:
/home/pranab/MTP/r5/genode/depot/genodelabs/src/gpt_write/2023-02-22-c/src/app/gpt_write/util.cc:48:
*undefined reference* to `jent_entropy_collector_alloc'
/usr/local/genode/tool/21.05/bin/../lib/gcc/riscv64-unknown-elf/10.3.0/../../../../riscv64-unknown-elf/bin/ld:
util.o: in function `void Genode::Log::output<char const (&)
[52]>(Genode::Log::Type, char const (&) [52])':
/home/pranab/MTP/r5/genode/depot/genodelabs/api/base/2022-11-28/include/base/log.h:70:
*undefined reference* to `jent_read_entropy'
collect2: error: ld returned 1 exit status
make[7]: *** [/home/pranab/MTP/r5/genode/repos/base/mk/prg.mk:218
<http://prg.mk:218>: gpt_write] Error 1
make[6]: *** [var/libdeps:151: gpt_write.prg] Error 2
make[5]: *** [Makefile:336: gen_deps_and_build_targets] Error 2
make[4]: ***
[/home/pranab/MTP/r5/genode/tool/depot/mk/build_bin_archive:208:
/home/pranab/MTP/r5/genode/depot/genodelabs/bin/riscv/gpt_write/2023-02-22-c.build/bin]
Error 1
make[3]: *** [/home/pranab/MTP/r5/genode/depot/var/build.mk:264
<http://build.mk:264>: genodelabs/bin/riscv/gpt_write/2023-02-22-c]
Error 2
make[2]: *** [/home/pranab/MTP/r5/genode/tool/depot/build:136:
execute_generated_build_mk_file] Error 2
make[1]: *** [/home/pranab/MTP/r5/genode/tool/depot/create:59:
build] Error 2
make[1]: Leaving directory '/home/pranab/MTP/r5/genode/build/riscv'

I am not able to fix this. Please help me understand the issues.

Thanks & Regards, Pranab